unleaded fuel?

Discussion in 'general muscle car related info' started by Grumpy, Aug 9, 2015.

  1. Grumpy

    Grumpy The Grumpy Grease Monkey Staff Member


    http://www.amazon.com/Motor-Medic-Gunk-M5012-Substitute/dp/B002008NWA

    add both the lead substitute and 4 oz of marvel mystery oil to each tank of fuel, the combo will greatly reduce valve seat wear, if you ever pull the heads to get a valve job insist on the machine shop installing hardened valve seats and new valve guides, valve seals and checking all the valve train clearances, and I highly recommend a 3 angle valve job and a 30 degree back cut on the valves

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    http://garage.grumpysperformance.co...olishing-combustion-chambers.2630/#post-50247

    http://garage.grumpysperformance.co...t-compressed-when-installed.11356/#post-51869

    http://garage.grumpysperformance.co...-loads-and-installed-height.10709/#post-46627

    http://garage.grumpysperformance.com/index.php?threads/valve-seal-selection.10469/#post-43881

    http://garage.grumpysperformance.co...lve-seat-angles-and-air-flow.8460/#post-29682

    http://garage.grumpysperformance.com/index.php?threads/multi-angle-valve-job-related.3143/#post-8387

    http://garage.grumpysperformance.co...oper-valve-spring-seats-shims.1005/#post-1818

    http://garage.grumpysperformance.com/index.php?threads/how-to-lap-valve-seats.1159/#post-2362
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    non-hardened valve seats regress into the head over time if used with non-leaded gas.
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    heads can be machined for hardened seats to allow use of unleaded fuel
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    hardened seats are then machined to properly seat the valves and ideally port and bowl work done to increase flow and reduce turbulance
    http://www.rlengines.com/Web_Pages/Valve_Seat_Installation.html
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    Last edited: Aug 9, 2015

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